To limit the probability that persons will not be promptly notified of a fire situation, which could lead to delays in evacuation or movement to a safe place, which could lead to harm to persons.
[For fire alarm systems designed to notify the fire department.] To limit the probability that emergency responders will not be promptly notified in a fire situation, which could lead to delays in carrying out fire emergency response operations, which could lead to the spread of fire, which could lead to harm to persons.